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ASCPi MLS Guide – TheCheckPoint Online Back to All Exams
🇺🇸 USA & International

MLS (ASCPi)
Certification Exam

Medical Laboratory Scientist

🏅 Credential: MLS(ASCPi)

Conducted by: ASCP Board of Certification (BOC)

Items
100
Format
CAT
Duration
2.5 hrs
Schedule
Year-round
Passing Score
≥ 400
Exam Fee
$260 USD

Table of Contents

ASCPi MLS Guide – Eligibility & Criteria
Certification Pathways

Eligibility Criteria

Global Education Routes
Applicants must satisfy the specific education, training, and clinical experience requirements defined by one of the official MLS(ASCPi) routes.
Academic Equivalency
The ASCP BOC reserves the right to request a course-by-course foreign transcript evaluation from an approved agency to verify U.S. degree equivalency.
Filipino Candidates
Most Filipino BS MedTech graduates qualify under Route 1 — a baccalaureate degree plus a Medical Laboratory Science training program (clinical rotations). Those without complete rotations in all four major areas should check Route 2 or use the Eligibility Quiz.
International Standing
The MLS(ASCPi)CM is the premier international credential for Medical Laboratory Scientists, recognized by leading laboratories worldwide.

Unsure which exam to take?

Use the official ASCP interactive tool to determine if you should apply for the U.S. or International (i) credential.

Take the Eligibility Quiz
ASCPi MLS Guide – Subjects & Format
Content Areas

Subjects & Weights (2025)

Percentages reflect the approximate proportion of the 100-item exam based on current ASCP BOC guidelines.

Blood Banking
17–22%
Chemistry
17–22%
Hematology
17–22%
Microbiology
17–22%
Immunology / Serology
5–10%
Urinalysis & Body Fluids
5–10%
Laboratory Operations
5–10%
View Official 2025 PDF Guidelines
Source: Current ASCP BOC MLS/MLS(ASCPi) Examination Content Guideline.
Exam Details

Format & Administration

Computer Adaptive Testing (CAT)
The exam is a 100-question computer adaptive test. No two exams are identical as questions adapt to your skill level in real-time.
100 Items in 2.5 Hours
You have 2 hours and 30 minutes to complete the exam. Schedule promptly after receiving your Authorization to Test (ATT).
Pearson VUE Centers
The exam is administered at Pearson VUE centers worldwide. Availability depends on the specific site and date you choose.
Year-Round Scheduling
There are no set windows. Once your application is approved, you can schedule your appointment at any time during your eligibility period.
MLS(ASCPi) Credential
MLS(ASCPi) is the international designation. Content is essentially identical to the U.S. exam, but eligibility routes are specifically for international applicants.
ASCPi MLS Guide – Requirements & Links
Quick Reference

Key Requirements

Official Transcripts
Must reflect completion of your degree. Should be sent directly from your school to the ASCP BOC.
Credential Evaluation
Foreign degrees must be evaluated by an ASCP-acceptable evaluation agency and sent directly to BOC.
Laboratory Experience
If required by your route—verified letter from employer on official letterhead specifying duties and duration.
Online Application + Fee
Application fee is $260 USD. Note: The Philippines is not eligible for reduced LMIC pricing; standard fees apply.
Authorization to Test (ATT)
Once approved, follow the validity and expiration details provided in your ATT letter to schedule your exam.
📌 Important
Requirements and fees are updated periodically by ASCP BOC. Always confirm current details on the official website before applying.
ASCPi MLS Guide – Application Roadmap
Application Overview

The Three-Phase Process

The ASCP BOC application follows a straightforward framework. For the most accurate, detailed instructions, always refer to the official ASCP BOC documentation.

Phase 1
Prepare
Review eligibility routes and gather required documentation (transcripts, evaluation, and experience forms). Understand all application policies before starting your journey.
Phase 2
Apply
Submit your online application through your ASCP account, upload documentation, and pay the non-refundable application fee ($260 USD).
Phase 3
Monitor
Track your application status in your ASCP account. Once approved, you will receive an Authorization to Test (ATT) to schedule your exam at a Pearson VUE center.
Common Questions

Frequently Asked Questions

Essential answers for international candidates based on official ASCP Board of Certification (BOC) documentation.

Both certifications utilize the same examination content and CAT format. MLS(ASCP) is for those educated in the U.S., while MLS(ASCPi) is for those educated internationally. If you're unsure which one to pick, you can take the official Eligibility Quiz here. As of 2026, ASCPi holders can transition to MLS(ASCP) status after gaining U.S. work experience.

Source: ascp.org/boc/explore-credentials/view-all-credentials/MLS

No. A PRC license is not a mandatory requirement for ASCPi eligibility routes. The ASCP Board of Certification focuses primarily on your academic degree and your clinical training in key areas. While not required for the exam, it is recommended to maintain your local license as proof of home-country licensure for certain work visa pathways.

Source: apps.ascp.org/services/boc/BOC_Cert_I_RouteRequirement

Requirements vary by route. Under Route 1, no post-graduation work experience is required if you have completed a clinical training program (internship) as part of your degree. Route 2 requires 3 years of clinical experience, and Route 4 requires 5 years. Most fresh graduates qualify under Route 1.

Source: apps.ascp.org/services/boc/BOC_Cert_I_RouteRequirement

Yes. Pearson VUE centers in the Philippines include locations in Makati (Manila) and Cebu. Verify current center availability at pearsonvue.com/ascp when scheduling. Once you receive your ATT, you can schedule your appointment directly. There is no need to travel abroad.

Source: ascp.org/boc/earn-a-credential/examination-process

Yes. You may schedule a retake as early as 30 days after an unsuccessful attempt. The ASCP BOC allows up to 5 attempts under the same eligibility route. If you do not pass, you will receive subtest scores to guide your focused review before your next attempt.

Source: ascp.org/boc — Application Policies

No. A scaled score of 400 is not a raw percentage. Because the ASCPi uses Computer Adaptive Testing (CAT), the difficulty adjusts based on your performance. A score of 400 indicates minimum required difficulty level to demonstrate competency. The scale is 0 to 999.

Source: ascp.org/boc/explore-credentials/view-all-credentials/MLS

Applicants must use an evaluation service from the official approved list. Commonly used agencies include Educational Credential Evaluators (ECE) and Globe Language Services. Evaluation must be sent directly from the agency to the ASCP BOC.

Source: ascp.org/boc — Acceptable Evaluation Agencies

Note: These FAQs are based on official ASCP BOC documentation for the 2025–2026 cycle. Policies are subject to change. Always verify current information at ascp.org/boc.

ASCPi MLS Guide – Prep Resources
ASCPi MLS PREPARATION SUPPORT

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ASCPi MLS Guide – Footer CTA

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Trademark Disclaimer: ASCP® and MLS(ASCPi)℠ are registered trademarks and service marks of the American Society for Clinical Pathology (ASCP) Board of Certification. TheCheckPoint Online is an independent review provider and is not affiliated with, endorsed by, or associated with the ASCP Board of Certification or any other official testing body.

Information Accuracy: While we strive to provide the most current information based on the 2025/2026 ASCP BOC guidelines, exam policies, fees, and requirements are subject to change without notice. Applicants are strongly advised to verify all details directly on the official ASCP BOC website before submitting an application.

Guide Last Updated: April 2026